Hare Krishna dear brother,
"Pls. forgive me If you got hurt from any of my sentences."
This is how you concluded in your previous message. I will not forgive you because you have not given any reason to be offended. You are like my brother to me (though a bit of a superstitious one, in my humble opinion).
You have recommended me to read a book compiled by a devotee of Lord Krishna. However since the book is written by a human being, I cannot accept as a 'Pramana'. I would prefer to read the GITA instead. In it I find no reference to any ghosts or about their existence. Even better, I would refer to the most Holy of all the Hindu scriptures - The Vedas. None of the rchas of the Rk Veda, nor any mantras of the later Vedas refer to the existence of ghosts. I do not believe in any other books or scriptures that are subsequent to the Vedas. I believe only in the Vedas, because they are the original source of all knowledge.
If by chanting mantras you gain any relief, I would suggest you receit the Gayatri mantra. It will make you so strong spiritually that you will be immune to all evil influences.
May the Divine Grace be with you,
Your brother,
Aditya Vandematharam.